In the mission, Zagara hunts the map for eggs. Kerrigan's forces can kill her. She respawns, but this gives time for Kerrigan to collect more eggs. Kerrigan immediately collects eggs upon touching them, while Zagara takes some time.

Only Kerrigan is able to collect baneling eggs, so the player must use her in the field. Zagara will also move about the map harvesting eggs, and moves with an escort. If the player kills her, she will tunnel back to her base to recover, buying time. Most of Zagara's attacks on the player's base consist of zerglings with smaller numbers of roaches and hydralisks, making banelings effective for defense. Zagara also has infested terrans, infestors, and mutalisks, but keeps them around her base. The player is free to gather eggs wherever they wish. The south-east portion of the map has fewer of Zagara's forces, and a mineral field for an expansion if desired, making it a preferable place to begin. The stage has several baneling nests, marked in yellow on the map. These nests instantly spawn a number of banelings for the player when approached. There are also two infested command centers for the player to destroy as an optional objective to gain two additional Kerrigan levels.

Once the player has recovered one hundred eggs, Abathur will hatch them, granting the player a massive number of banelings and zerglings. Zagara will move back to her base to defend it, and the mission objective is now to destroy her base in the northeast corner of the map. The player should move the banelings to the front of the army, then command all their forces to attack. The banelings will obliterate all of Zagara's ground forces, leaving only mutalisks to defend her. With a handful of swarm queens and Kerrigan to fight the mutalisks off, the zerglings will be free to destroy Zagara's base. The player does not need to destroy all structures on the map to win, just the structures in Zagara's base.

It is possible to ignore the egg-gathering objective and destroy Zagara's base without collecting them. If this is done in under fourteen minutes on Hard difficulty, it rewards the Shutout achievement.

If one is looking to get the "No Egg for You" achievement, a good strategy is to use several swarm hosts and camp them outside the entrance to Zagara's base. Alternatively, one could use impalers or lurkers in a similar fashion. With Zagara's forces trapped, you will be free to collect the eggs without worrying about Zagara getting to them.